A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT

Abstract

The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of a commissioning campaign with the KELT telescope to observe the open cluster Praesepe for 34 nights in early 2005. Lightcurves were obtained for 69,337 stars, out of which we identify 58 long period variables and 152 periodic variables. Sixteen of these are previously known as variable, yielding 194 newly discovered variable stars for which we provide properties and lightcurves. We also searched for planetary-like transits, finding four transit candidates. Follow-up observations indicate that two of the candidates are astrophysical false positives, with two candidates remaining as potential planetary transits.

arXiv comment45 pages, 16 figures. Submitted to AJ. PDF version with full resolution figures located at http://www.astronomy.ohio-state.edu/~pepper/kelt.pdf

References in corpus (24)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• A method for optimal image subtraction
• Detection of an Extrasolar Planet Atmosphere
• The WASP Project and the SuperWASP Cameras
• A box-fitting algorithm in the search for periodic transits
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• Correcting systematic effects in a large set of photometric lightcurves
• The Interiors of Giant Planets: Models and Outstanding Questions
• TrES-1: The Transiting Planet of a Bright K0V Star
• The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large-Area Synoptic Surveys
• Prospects for the Characterization and Confirmation of Transiting Exoplanets via the Rossiter-McLaughlin Effect
• WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
• HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting one Member of a Stellar Binary
• The XO Project: Searching for Transiting Extra-solar Planet Candidates
• TrES-2: The First Transiting Planet in the Kepler Field
• The Distances to Open Clusters from Main-Sequence Fitting. III. Improved Accuracy with Empirically Calibrated Isochrones
• A Transiting Planet of a Sun-like Star
• Transit Detectability of Ring Systems Around Extrasolar Giant Planets
• TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit
• Survey for Transiting Extrasolar Planets in Stellar Systems: III. A Limit on the Fraction of Stars with Planets in the Open Cluster NGC 1245
• DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. I. Variables in the Field M31B
• HAT Variability Survey in the High Stellar Density "Kepler Field" with Millimagnitude Image Subtraction Photometry
• Crossing into the substellar regime in Praesepe
• The Optical Gravitational Lensing Experiment. Planetary and Low-Luminosity Object Transits in the Fields of Galactic Disk. Results of the 2003 OGLE Observing Campaigns

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• A PSF-based approach to Kepler/K2 data. II. Exoplanet candidates in Praesepe (M 44)
• Zodiacal Exoplanets in Time (ZEIT) VII: A Temperate Candidate Super-Earth in the Hyades Cluster
• Survival Rates of Planets in Open Clusters: the Pleiades, Hyades, and Praesepe clusters
• How do disks and planetary systems in high-mass open clusters differ from those around field stars?
• Stellar rotational periods in the planet hosting open cluster Praesepe
• Five transiting hot Jupiters discovered using WASP-South, Euler and TRAPPIST: WASP-119 b, WASP-124 b, WASP-126 b, WASP-129 b and WASP-133 b
• HD 24355 observed by the Kepler K2 mission: A rapidly oscillating Ap star pulsating in a distorted quadrupole mode
• Whole Earth Telescope discovery of a strongly distorted quadrupole pulsation in the largest amplitude rapidly oscillating Ap star
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with $K2$ photometry
• Planets in Open Clusters Detectable by Kepler
• Photometric study of an Eclipsing Binary in Praesepe
• Confirming the Tidal Tails of the Young Open Cluster Blanco 1 with TESS Rotation Periods
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• The EB Factory Project. II. Validation with the Kepler Field in Preparation for K2 and TESS
• A New Method For Robust High-Precision Time-Series Photometry From Well-Sampled Images: Application to Archival MMT/Megacam Observations of the Open Cluster M37
• FR Cnc Revisited: Photometry, Polarimetry and Spectroscopy
• A Transmission Spectrum Of HD 189733b From Multiple Broadband Filter Observations
• The NStED Exoplanet Transit Survey Service
• The LAEX and NASA portals for CoRoT public data